Air Conditioner Repair Checklist
1. AC Won’t Turn On
There can be several causes why your air conditioning won’t work: a blown circuit breaker, incorrect thermostat settings, a turned off switch or a full condensate drain pan.
Tripped Circuit Breaker
Your AC won’t start when you have a tripped breaker.
To find out if one has blown, go to your residence’s main electrical panel. You can locate this silver fixture on the wall in the basement, garage or closet.
- Confirm your hands and feet aren’t wet before you check the panel or breakers.
- Find the breaker labeled “AC” and make sure it’s in the “on” position. If it’s tripped, the switch will be in the "off" position.
- Firmly shift the switch back to the “on” location. If it instantly triggers again, don’t reset it and contact us at 507-218-0088. A fuse that keeps turning off may signal your residence has electrical trouble.
Inaccurate Thermostat Settings
If your thermostat isn’t telling your AC to start, it won’t switch on.
The first step is ensuring it’s on “cool” and not “heat.” Otherwise your air conditioner may not turn on. You might also get heated air blowing from vents being the furnace is running instead.
If you’re using a traditional thermostat:
- Swap out the batteries if the readout is empty. If the readout is showing scrambled characters, replace the thermostat.
- Make sure the right setting is showing. If you can’t change it, cancel it by lowering the temperature and hitting the “hold” button. This will cause your AC to run if scheduling is not right.
- Try setting the thermostat 5 degrees below the room’s temperature. Your AC won’t start if the thermostat is set the same as the house’s temperature.
Once your thermostat is set properly, you should receive refreshing air quickly.
If you’re using a smart thermostat, like one produced by Nest, Ecobee, Lux, Honeywell or Bosch, check the manufacturer’s website for help. If it still won’t work, reach us at 507-218-0088 for support.
Your system probably has a shut-down device near its condenser. This switch is commonly in a metal box attached to your home. If your equipment has recently been serviced, the device may have accidentally been turned off.
Blocked Condensate Drain Pan
Condensate drain pans keep the additional liquid your system removes from the air. This pan can be positioned either under or within your furnace or air handler.
When there’s a blockage or blocked drain, water can become concentrated and trigger a safety setting to turn off your air conditioner.
If your pan has a PVC pipe or drain, you can drain the additional condensation with a special pan-cleaning capsule. You can buy these tablets at a home improvement or hardware retailer.
If your pan includes a pump, locate the float switch. If the lever is “up” and there’s water in the pan, you might have to get a new pump. Reach us at 507-218-0088 for assistance.
2. AC Blows Warm Air
If your AC is working but not cooling, its airflow could be clogged. Or it may not have sufficient refrigerant.
Your system’s airflow can be limited by a clogged air filter or dirty condenser.
How to Change Your Air Filter
A dirty filter can create many troubles, including:
- Lower airflow
- Icy refrigerant lines or evaporator coil
- Inconsistent cooling
- Bigger electricity expenses
- Leading your system to wear out sooner
We propose replacing flat filters monthly, and pleated filters every three months.
If you can’t recall when you last replaced your filter, turn off your unit totally and remove the filter. You can spot the filter in your furnace or air pump’s blower compartment. It could also be located in a connected filter box or wall-mounted return air grille.
Hold the filter up to the sunshine. If you see a lot of dust, you need to buy a new filter.
4 Steps to Cleaning Your Cooling Unit
Greenery, vegetation and sticks can block your condensing unit. This can reduce its airflow, lower its energy efficiency and affect your comfort. Here’s a method you can follow to get your system working properly again.
- Shut off power totally at the breaker or outside device.
- Get rid of yard waste around the air conditioner. Once you’ve cleared all the debris within a two-foot space, you can use a paint brush or vacuum to gingerly remove dust from the unit’s fins. Crooked fins can also impact efficiency.
- Use a hose nozzle to gingerly take off dirt on the fins from inside the equipment. Make sure to avoid getting water on the fan motor.
- Turn on the power.
Not Enough Refrigerant
When cooling systems don’t have adequate refrigerant, they’ll struggle to remove heat and humidity from your house.
Here are several flags that your equipment is losing refrigerant:
- It takes a long time to refresh your space and you’re constantly turning down the thermostat.
- Cooling blowing through the vents isn’t as chilly as it should be.
- You’re hearing hissing or gurgling sounds when cooling runs.
- Your evaporator coil is frosty due to having trouble absorbing humidity.
Suspect your unit is losing refrigerant? You need a authorized heating and cooling service professional to take care of the leak and restore the proper amount of refrigerant in your system. Reach us at 507-218-0088 for support.
3. AC Not Blowing Enough Air
When it seems like you’re not having enough chilled air, there’s likely a blockage or separation inside your air conditioning unit.
- The first step is checking your air filter. Buy a new one if it’s soiled.
- Make sure the ductwork is open around your home.
- If you’re still not experiencing sufficient chilly air, you should have your ductwork checked by a pro like Brogan Heating & AC Inc. Your duct system could need to be fixed or hooked up again in tricky locations like your attic, basement or crawl space.